Structure for shaping makeup brush

ABSTRACT

The present invention relates to a structure for shaping makeup brush, in which a makeup brush containing bristles, such as a lash brush or lip brush for regular use in make-up, includes a hollow bristle shell made of rubber or plastics that is molded with an arrangement of bristles to receive a shaping bar that is made in advance with a proper curving design to be inserted and enclosed therein, with a minute projecting positioning piece being formed at an end thereof to be inserted into and assembled with a recessed insertion slot formed in an inner end of the bristle shell. The bristle shell so assembled with the shaping bar is inserted into an insertion cavity formed in an end of the brush bar and pawls formed in a circumferential surface of the brush bar through punching engage and retain a recessed circumferential groove formed in the shaping bar.

(a) TECHNICAL FIELD OF THE INVENTION

The present invention generally relates to an improved structure for shaping makeup brush, which is an improved design of structure for shaping and assembling bristles that, in an attempt to make varied curving and shaping of bristles of a lash brush, allows of easy operation of shaping and prevents a bristle shell from getting loosened and undesirably rotated

(b) DESCRIPTION OF THE PRIOR ART

A commonly seen brush structure that is formed by lining up or otherwise arranging bristles for makeup purposes is often manufactured through implantation of bristles, especially for the bristles of lash brush, because they are usually long and requires to be manufactured in such a way to show proper curving for facilitating easiness and safety of use in doing lash markup. The bristles of a conventional lash brush is often arranged to line up in a one by one fashion and thin metal wire is adopted for specific curving configuration at an intermediate section to provide a sequential arrangement of bristles for helical configuration and with the bristles being of different lengths, a curved outside configuration of a bristle face is formed to facilitate the operation of lash makeup. The conventional design of curved bristle face is formed through proper arrangement of bristles of various lengths to show a fixed curved arranged and this is done with lining-up and looping that takes a great effort and requires specific machinery. Consequently, the manufacturers turn to manufacturing through shaping comfortable and elastic rubber materials in order to uses a mold to help manufacturing and shaping that may properly changes the configurations of bristles to thereby ensure better result of attachment for use. However, manufacturing realized through a solid form makes the material costs increased and the product heavy. Some manufacturers thus provide a hollow configuration of bristle shell to allow of versatile variation of curving. An example is shown in US Patent Application Serial No. 2009/0293900A1, in which a pre-formed hollow bristle shell 16 is provided with a front-to-rear through structure and a pre-formed shaping bar 48 is inserted into the hollow interior of the bristle shell. A fixing pin 58 is arranged outside an insertion end of the bristle shell and extends from outside to inside to secure the end of the bristle shell so that the bristle shell so shaped can be used in a safe way to attach a cosmetic liquid for brushing and makeup of lash. The fixing structure of the conventional bristle shell is firstly done with a pin structure made of metals that functions for securing and positioning at an end. Since the metal is not just heavy and may induce chemical reaction with the cosmetic liquid, it is getting out of use in general cosmetics, otherwise specific surface treatment must be adopted, which increases the costs. Further the conventional structure of external pin requires additional assembling time and due to the curved shape of the bar and the extreme thin bar diameter, with an end being inclined or curved, it is generally impossible to do machine based production, leading to inconvenience of assembling operation and eventually resulting in poor quality control and not mass producible, which are generally “blind spots” of actual manufacture. Further, for a fixing bar having a conventional circular bar cross-section, due to the coupling operation at the tip end being unreliably secured, the bristle shell may get moved with the brush when the brush is put into use, leading to poor use conditions of loosening or minute rotation. It is thus desired to make an improvement on the state-of-the-art bristle shell structure for make up brush in order to achieve the effects of easily and reliably fixing shape of bristles of lash brush and provide practical values of mass production and economic efficiency. This is the main goal of the present invention.

SUMMARY OF THE INVENTION

The present invention aims to provide an improved structure for shaping makeup brush in consideration of the needs for easy make-up and efficient and safe manufacturing, wherein a hollow-configured U-shaped bristle shell having a bottom of the hollow space forming a positioning insertion slot to allow a projection of a positioning member at an end of a pre-formed shape-fixing bar to directly fit therein, so as to realize easy insertion and fixing purposes assembling and provide an anti-rotation assembling for effectively improving the previously discussed drawbacks and inconveniences found in the conventional designs of known shaping bristle shells.

The primary objective of the present invention is to directly form a fixing insertion slot in an inner end of a hollow interior of a molded bristle shell of a brush for easy insertion, positioning, and fitting of a mating projection formed on an end of a shaping bar so that the makeup brush so shaped, after being inserted into an insertion cavity formed in an end of a brush bar, through projecting pawls that are formed through punching being simply fit into and retaining a recessed circumferential groove formed in the shaping bar, simultaneously fixes an end of the bristle shell against loosening and rotating, whereby the curve of the shaping bar can be fixed at predetermined curving position to achieve assembling that shapes the bristle shell and simultaneously fixes opposite ends and thus ensuring the advantages of safety and convenience of use for makeup operation.

The foregoing objectives and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.

Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded view of a structure for shaping makeup brush according to the present invention.

FIG. 2 is a perspective view showing the assembled makeup brush according to the present invention.

FIG. 3 is a cross-sectional view showing the structure of a bristle shell of the makeup brush according to the present invention in an assembled condition.

FIG. 4 is a partial exploded view illustrating shaping and assembling of the makeup brush according to the present invention.

FIG. 5 illustrates insertion and fixing structure arranged in the bristle shell of the makeup brush according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The following descriptions are exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims.

The present invention, which is an improvement of structure for shaping makeup brush, provides an improved design of bristle plane shaping and fixing structure that allows of easy operation of curving and shaping a bristle plane of makeup brush and has a structure that is illustrated in FIGS. 1-5. A bristle structure of a commonly used lash brush will be illustrated herein as an example for explanation and comprises an assembly that comprises a body for hand gripping, an external cap 10 that is provided for closing an opening of a makeup liquid receiving container being generally used as the body for hand gripping, and the cap has an inwardly recessed central portion that is provided with a brush bar 11 fixed thereto with an outward-extending end of the bar forming in a center thereof a recessed insertion cavity 12; a bristle shell 20 that is made of pre-molded rubber or plastic material in the form of a U-shaped tubular bag, where an outer circumferential surface, starting from a location adjacent to the bottom of the U-shape, is provided with an arrangement of bristle stems projecting a predetermined length during the molding process, the length and spacing adopted in the arrangement being suitably designed and adjusted according to requirements for actual makeup and brushing operations to constitute a setup of bristle plane 22 that is integral and provide a desired brushing length, the bristle plane 22 having a lower end that is extended to show a form of sleeve 23 for receiving a shaping bar 24 to fit therein. The shaping bar 24 is made in advance through plastic molding, having an outside length corresponding to the bristle shell 20 to extend into the sleeve 23 to be assembled in an enclosed and concealed condition. Being recessed in a tip of a lower end of the bag of the bristle shell 20, an insertion slot 25 for insertion and coupling is formed, having a configuration identical to a positioning piece 26 projecting from an insertion top end of the shaping bar 24, the positioning piece 26 being generally arranged in the form of an elongate rectangular plate for easy insertion, fixing, and coupling so as to fix an outer end of the bristle shell 20 without undesired events of getting loosened and rotated thereby ensuring secured assembling of the bristle plane 22. Thus, the design of the insertion slot 25 can be a single slot or multiple slots in an alternating fashion, as shown in FIG. 4, or can be of a configuration corresponding to the positioning piece 26 projecting from the shaping bar 24 to facilitate easy insertion and coupling of the positioning piece 26 during the insertion of the shaping bar 24. Further, the design of the positioning piece 26 can alternately be a truncated plane of a projection or an arrangement of multiple-lateral projection, both satisfying the needs of suitably positioning and assembling through insertion. Through the design of curved configuration of the shaping bar 24, the bristle shell 20 can achieve interchangeable use of various configurations. Then, the whole brush that has been fixed in shape through the insertion, after having the sleeve 23 rigidified through insertion of the shaping bar 24, is handled in combination with a circumferential groove 27 that is recessed, in advance, in a bar surface of the shaping bar 24, in order to insert and position the rigidified sleeve 23 into an inner end of the insertion cavity 12 of the brush bar and then, punching is carried out outside the brush bar at multiple circumferentially-spaced points corresponding in position to the circumferential groove 27 to have the bar surface of the brush bar forming one-side punched-down, inclined pawls 28 with each inclination engaging and retaining the circumferential groove 27 recessed in the shaping bar 24, achieving insertion and fixing of the opposite end of the bristle plane 22, and this constitutes a complete assembly of structure of lash brush for easy operation of makeup.

The feature of the improved structure for shaping makeup brush is that the bristle portion is made of an elastic material to pre-form a bristle shell 20 in the form of an elongate hollow U-shaped bag, which is used in combination with a rigid shaping bar 24 that is molded and shaped with a predetermined curved configuration having a bar diameter corresponding to the hollow hole configuration of the bristle shell 20, where the bristle shell 20 has a recessed lower end in which an insertion slot 25 is formed for being assembled through receiving insertion of the shaping bar 24 that forms a projecting positioning piece 26 to fix the end section of the sleeve through simple insertion without occurring undesired movements of rotation and displacement. The outside bar surface of the whole shaping bar 24 does not need design change for specific orienting and shaping, helping simplifying the assembling operation through insertion. Through the insertion of the rigid shaping bar 24, the flexible bristle shell 20 automatically follow the shape of the bar to show a corresponding curved configuration, constituting an outside configuration of the bristle plane 22 for makeup operation. The so inserted and completed bristle shell 20 and the shaping bar 24 is together inserted and assembled, and thus positioned, in the inner bottom of the insertion cavity 12 of the brush bar, together with the retention arrangement realized through multiple point punching performed outside the brush bar that makes the punched inclined U-shaped pawls 28 fit into and retaining the circumferential groove 27 recessed in the circumferential surface of the shaping bar 24 to achieve safe positioning and assembling of the brush. The lash brush so shaped allows the bristle plane 22 thereof to meet the needs of makeup operation according to the desired makeup operation. The two ends of the complete the bristle shell 20 are both inserted and positioned so that the coupling is sound without causing any evens that affects the makeup operation through any undesired movements induced by rotation and sliding. The insertion and fixing structure realized through the positioning piece 26 projecting from the end of the shaping bar 24 can be done in a single insertion process and no secondary processing or handling is necessary without any concern about the curvature thereof. No poor use caused by difficult securing may occur due possibly to curvature and small diameter of a bar in securing with a peg pin as disclosed in the previously mentioned prior art reference. The design of curving, shaping, and fixing structure according to the present invention can actually achieve the practical advantages of easy manufacturing and sound coupling. Such simplified manufacturing and features of practicability, safety, and convenience are surely not matched by the state-of-the-art makeup brush shaping structure. Thus, besides containing less parts, providing improvements on practical efficacies in respect of safe of positioning and easy assembling, and being not very technique depending, the structural design of the present invention provides a feature of practicability and convenience of comfortable and safe gripping and operation in doing make-up. Such novel features that are full of improvement of practical advantages are improved designs of innovated structure for makeup measures of this kind.

In summary, the improved structure for shaping makeup brush according to the present invention uses a U-shaped bag like bristle shell to directly fit to a previously formed the shaping bar in order to make a curved configuration of the bristle plane. Besides the structure being simplified, the convenient and practical features of coupling through simple insertion of the positioning piece projecting from the end of the bar into the insertion slot in the inner end of the bristle shell ensures an advantage of sound coupling for makeup operation with the bristle plane. The novel and safe and convenient features of requiring fewer parts in assembling and facilitating easy makeup operation are provided.

It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above.

While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the spirit of the present invention. 

I claim:
 1. A structure for shaping makeup brush, comprising a container having an opening for receiving and holding a cosmetic liquid and a cap for closure, and a brush bar having an end inserted and fixed to an inner end of the cap, the brush bar having a projecting end that is provided with a section of bristle plane member for makeup brushing purposes, characterized in that the bristle plane is formed of bristle stems that are arranged on an outside of an elastic hollow bristle shell, the hollow bristle shell having an interior space receiving a shaping bar having a predetermined curved configuration to fit therein to form a curved configuration corresponding to the shaping bar, the bristle shell having an inner end forming an insertion slot for receiving a positioning piece projecting from an insertion top end of the shaping bar to directly insert into the insertion slot for coupling and positioning to prevent the bristle shell from sliding and shifting after being shaped, the sleeve of the bristle plane and the shaping bar being directly inserted into and positioned in an insertion cavity defined in an end of a brush bar, inclined pawls being formed through punching outside the brush bar to engage and retain the bristle shell and the shaping bar, thereby realizing manufacture and assembling of easy shaping for makeup brush and ensuring convenience of use and safety of makeup operation.
 2. The structure for shaping makeup brush according to claim 1, wherein the shaping bar has a bar surface in which a recessed circumferential groove is formed for retaining engagement in coupling with the brush bar.
 3. The structure for shaping makeup brush according to claim 1, wherein the punched inclined pawls on the brush bar are arranged as multiple points along a circumference.
 4. The structure for shaping makeup brush according to claim 1, wherein the positioning piece projecting from the top end of the shaping bar has a configuration corresponding to the insertion slot formed in the inner end of the bristle shell.
 5. The structure for shaping makeup brush according to claim 1, wherein the positioning piece is shaped as a truncated plane or an arrangement of multiple-lateral projection. 